Airfoil flap conical extension mechanism

Details Airfoil flap conical extension mechanism Airfoil flap conical extension mechanism

1977-11-14

1979-10-30

Kelmachter, Barry L.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244215, B64C 920

Patent

active

041725751

ABSTRACT:
A pair of motion-amplifying flap linkages connected externally to the undersurface of a tapered planform airfoil and being spaced apart spanwise thereof for a combined pseudo conical extension movement of a tapered-chord flap section. The pair of flap linkage mechanisms conjointly first extending the tapered chord flap section chordwise of the airfoil and then rotatably tilting the flap to increase its angle of incidence, such that the chordwise length of movement and rotation of the flap, is proportional to the length of the airfoil chord at that cross-section of the airfoil; and approximates a conic motion of the flap relative to the airfoil.

REFERENCES:
patent: 3767140 (1973-10-01), Johnson

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